A Point Charge Of $3.00 \mu \mathrm{C}$ Is Located on The $y$

A point charge of $3.00 \mu \mathrm{C}$ is located on the $y$ -axis at $y=4.0 \mathrm{~m}$ , another point charge of $6.0 \mu \mathrm{C}$ is located on the $x$ -axis at $x=5.0 \mathrm{~m}$ , and a third charge of $7.2 \mu \mathrm{C}$ is located at $(5.0 \mathrm{~m}, 4.0 \mathrm{~m})$ . What is the magnitude of the force on the $7.2 \mu \mathrm{C}$ charge?

A) $3.3 \times 10-2 \mathrm{~N}$
B) $1.9 \times 10^{-2} \mathrm{~N}$
C) $2.5 \times 10^{-2} \mathrm{~N}$
D) $1.2 \times 10^{-2} \mathrm{~N}$
E) $1.6 \times 10-2 \mathrm{~N}$